Photo AI
4. Write two methods of photo reduction - Leaving Cert Home Economics - Question 4 - 2021
Question 4
4. Write two methods of photo reduction. (i) (ii) Answer on the usage of diagrams where it is necessary to illustrate your answers.
Worked Solution & Example Answer:4. Write two methods of photo reduction - Leaving Cert Home Economics - Question 4 - 2021
Step 1
Method of Image Compression
Answer
Image compression is an effective method of photo reduction that reduces the file size while maintaining the visual quality of the image. There are two main types of compression:
-
Lossy Compression: This method reduces file size by removing some data from the image, which can affect quality. Formats like JPEG use lossy compression.
-
Lossless Compression: This preserves the original data of the image, ensuring no quality loss. Formats like PNG and TIFF utilize lossless methods. Diagrams can be used to compare the visual differences between lossy and lossless compression.
Step 2
Method of Resizing
Answer
Resizing is another straightforward method of photo reduction where the dimensions of the image are changed. This method decreases the width and height of the image, resulting in a smaller file size.
-
Scaling Down: Reducing the pixel dimensions (e.g., changing a 4000x3000 image to 800x600).
-
Changing Resolution: Lowering the DPI (dots per inch) settings. For example, reducing an image from 300 DPI to 72 DPI decreases the overall file size significantly. Diagrams can illustrate the effects of resizing in terms of image clarity and file size.